Door fastener



A. D. AND N. N. IRWFW.

DOOR FASTENER.

APPLICATION men mm: 14, 1921.

2 SHEETS-SHEET .1

A. D. AND N. N. IRWIN.

DOOR FASTENER. APPLICATION FILED JUNE I4, 1921.

Patented Oct. 10, 1922.

2 S'HEETSSHEET 2.

Patented Get. 10, 1922.

warren ALBION I). IRWIN AND NOVA N. IRWIN,

OF EAST PITTSBURGH, PENNSYLVANIA.

"tarts noon rasrnivna.

Application filed June 14, 1921. Serial No. 477,498.

To (all whom it may concern: Be it known that we, ALBION D.'IRWIN ant NOVA N. IRWIN, citizens of the United States,

residing in East Pittsburgh, Pennsylvania,

have invented certain Improvements in Door Fasteners, of which thefollowing is a $13801- fication.

The object of our invention is to construct a door fastener, which willlook a door In the closed position and which can also be arranged tolook a door in a partially closed position, and which can be shifted toallow the door to be freely opened and closed.

This object we attain in the following manner, reference being had tothe accompanying drawings, in which:

Fig. 1 is a plan view of our lmproved door fastening, showing thepivoted arm extended;

Fig. 2 is a. side view, showing the arm in the position illustrated inFig. 1;

Fig. 3 is a face view,-

Fig. 4 is a view showing the arm in the lowered position;

Fig. 5 is a perspective View of the bearing plate for the arm;

Fig. 6 is a perspective View of the arm; and

Fig. 7 is a perspective view of the bolt and its casing.

Referring to the drawings, 1 is the door and 2 is the jamb. 3 is thebolt casing secured to the door by screws 4, or other fastenings. 5 isthe bolt having a reduced stem 6 provided with a knob '7 so that thebolt can be retracted against the pressure of a spring 8, which isconfined between the casing and a shoulder on the bolt 5. Another spring9 is located between the casing and the knob. These two springs retainthe bolt in the position illustrated in Fig.- 1, yet allow it to yieldin either direction. On the end of the bolt is a T-head 10 and the. boltis beveled at 11, Fig. 7. Secured to the frame of the jamb 2 is abearing plate 12, Fig. 5, which has two bearings 13 spaced apart andlocated 1n this space is the arm 14. A pivot pin 15 extends through theopenings 16 in the bearings 13 and through openings 17 in the arm 14.The arm has an elongated slot 18 terminating at the pivot end in anenlarged, curved slot 19. In this slot is a shoulder 20.

21 is a pin adapted to openings in the bearings 13 and an opening in thearm 14 so as to lock the arm in the raised position, as

shown in Figs. 1 and; 2. lVhen the pin is withdrawn, the arm swings onits pivot to the position shown in Fig. 4.

It will be noticed, on referring to Figs. 1 and 2, that the end of thebolt 5 projects into the slot of the arm and when the door is closed, asin said figures, the bolt is free to be retracted. The'T-head 10 of thebolt projects beyond the arm so that, when the door is opened, the boltwill slide in the slot 18 and, as the T-head is wider than the slot, thebolt cannot be retracted when the door is moved to the position shown bydotted lines in Fig. l. lVhen the door is in this position, it is openedfor ventilation. The door cannot be opened farther, as the bolt willcome in contact with the outer end of the slot. When in this position,the pin 21 can be withdrawn, as the bolt will hold the arm in the raisedposition. If any one should attempt to open the door by first closingit, the bolt would drop to the position shown in Fig. 4, and the surface22 of the slot 19 would prevent the opening of the door, even to theposition shown by dotted lines in Fig. 1.

When it is desired to lock the door against opening, then the arm ismoved to the position shown in Fig. 4, and acts as an ordinary keeper.When it is desired to move the arm out of action, then it is shifted tothe position illustrated by dotted lines in Fig. 2, and the pin 21. isinserted through a slot 19. In. this position, the bolt 5 is clear ofthe arm.

Thus it will be seen that we provide a door fastening, which will lockthe door in the closed position; will allow the door to be opened to acertain extent and locked, and which can be so arranged that when thedoor is closed, any endeavor to move the door past the lock willautomatically lock the door in the closed position. The device is alsoso arranged that the parts can be moved to an inactive position.

The latch is so designed that it can be used on a right or a left handdoor and can also be u'ed as a front door lock, or as a lock for a bedroom door. It can be used in any position where it is desired to providemeans for locking a door in a partially open position.

l/Ve claim:

1. The combination in a door fastening, of a casing; a headed boltmounted in the casing; a bracket; and an arm pivotally mounted on thebracket, said arm having a longitudinal slot therein, said slot beingnarrower than the headed portion of the bolt, the inner end of said slotbeing enlarged and arcuately curved around the amounted on the bracket,said arm having a longitudinal slot therein narrower than the head ofthe bolt, and a curved enlarged slot at the pivot end, whereby uponclosing of the door the arm may drop on its pivot and so engage the boltthat the door .is locked from opening until the bolt is withdrawn.

3. The combination in a door fastening, of a casing; a bolt mounted inthe casing and having an enlarged head; a bracket; an arm horizontallypivoted to the bracket, said arm having a straight slot terminating in acurved slot at the pivot point, said arm being arranged to coact withthe bolt, whereby the bolt is held in horizontal position while the boltis within the straight slot but is free to drop when the bolt is withinthe curved portion of the slot; and a pin for retaining the arn'i in thehorizontal position.

ALBION D. IRWIN.

NOVA N. IRWIN.

